Use estimateGas error (as per updated implementation) (#4131)

* Use estimateGas error (as per updated implementation)

* EXCEPTION_ERROR as per #4142

js/src/ui/GasPriceEditor/store.js

@@ -62,6 +62,10 @@ export default class GasPriceEditor {
     this.errorTotal = errorTotal;
   }
 
+  @action setEstimatedError = (errorEstimated = ERRORS.gasException) => {
+    this.errorEstimated = errorEstimated;
+  }
+
   @action setEstimated = (estimated) => {
     transaction(() => {
       const bn = new BigNumber(estimated);
@@ -69,11 +73,11 @@ export default class GasPriceEditor {
       this.estimated = estimated;
 
       if (bn.gte(MAX_GAS_ESTIMATION)) {
-        this.errorEstimated = ERRORS.gasException;
+        this.setEstimatedError(ERRORS.gasException);
       } else if (bn.gte(this.gasLimit)) {
-        this.errorEstimated = ERRORS.gasBlockLimit;
+        this.setEstimatedError(ERRORS.gasBlockLimit);
       } else {
-        this.errorEstimated = null;
+        this.setEstimatedError(null);
       }
     });
   }

js/src/ui/GasPriceEditor/store.spec.js

@@ -82,6 +82,24 @@ describe('ui/GasPriceEditor/store', () => {
       });
     });
 
+    describe('setEstimatedError', () => {
+      it('sets the value as provided', () => {
+        store.setEstimatedError('errorTest');
+        expect(store.errorEstimated).to.equal('errorTest');
+      });
+
+      it('sets the null value as provided', () => {
+        store.setEstimatedError('errorTest');
+        store.setEstimatedError(null);
+        expect(store.errorEstimated).to.be.null;
+      });
+
+      it('sets a default error when none provided', () => {
+        store.setEstimatedError();
+        expect(store.errorEstimated).to.equal(ERRORS.gasException);
+      });
+    });
+
     describe('setEstimated', () => {
       it('sets the value', () => {
         store.setEstimated('789');